25. Las Vegas-Henderson, NV-AZ
Out of 288 metropolitan areas, Las Vegas is ranked 10th for the high ozone days. Moreover, it is 37th on the list for 24-hour particle pollution out of 186 metropolitan areas and 43rd for annual particle pollution out of 184 metropolitan areas. The number of people with lung cancer is 1,367.
![25 Most Polluted Cities in the US in 2017](https://imonkey-blog.imgix.net/blog/wp-content/uploads/2017/03/23070324/shutterstock_67615738-750x500.jpg?auto=fortmat&fit=clip&expires=1752624000&width=480&height=320)
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